Monolithic Power Systems Inc. MP4060GS-P

Overview

MP4060GS-P from Monolithic Power Systems is a TRIAC-dimmable, primary-side control LED controller optimized for 200–265VAC input, delivering PFC and boundary-conduction-mode operation with integrated thermal foldback, active bleeder control (BD pin), and dual-dimming-phase detection. It enables single-stage AC/DC LED drivers up to 50W for residential lighting with warm sunset color temperature control via the DIM pin.

For engineers reviewing the MP4060GS-P datasheet, MP4060GS-P pinout, MP4060GS-P application, or MP4060GS-P equivalent, key selection criteria include its 200–265VAC line-range optimization, adaptive leading/trailing-edge dimmer detection thresholds (VMULT_LD_HIGH = 0.26–0.30 V, VMULT_TL_LOW = 0.08–0.12 V), internal 30V/250mΩ MOSFET, and SOIC-8 package compatibility with fast start-up (tSTART = 100–165 µs).

Technical Context

The MP4060GS-P implements real-current control using primary-side sensing-deriving LED output current (I_OUT) from V_REF (0.414 V), turn ratio N, and sense resistor R_S-eliminating secondary-side feedback. Its multiplier (MULT) input accepts a half-wave sinusoid from the rectified AC line to generate a phase-aligned current reference for high power factor (>0.9 at full load).

Boundary-conduction mode (BCM) operation is enforced via zero-current detection (ZCD) with programmable blanking (tZCD_LEB = 0.95–1.68 µs), minimizing switching losses. Adaptive dimmer detection uses MULT voltage thresholds and timing (tLD = 86–134 µs for leading-edge; tTL = 388–602 µs for trailing-edge) to auto-select DP current sources (IDP_STRONG_LD = 27–43 mA; IDP_TL = 133–167 mA).

Key Specifications

Pinout & Package

MP4060GS-P is housed in an SOIC-8 package with exposed pad (thermal performance: θ_JA = 96°C/W). Pin functions are validated per MPS datasheet Rev. 1.0 (2015), with no MSOP-10 variant implied by the -GS suffix.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar TRIAC-dimmable PFC LED controller applications.

Compared with MP4060GS-P, MP4061GS-P trades DIM-based warm sunset capability for integrated HV switching in isolated topologies, while NCP1083DR2G sacrifices dimmer adaptability and system integration to achieve lower unit cost in fixed-function designs.

Availability

MP4060GS-P is available at Aetrix Electronics and suitable for residential LED lamps, commercial downlights, and industrial high-bay fixtures requiring stable component supply, long-lifecycle support, and RoHS-compliant manufacturing.

Supply support for MP4060GS-P includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Monolithic Power Systems (MPS) is a fabless semiconductor company specializing in high-performance analog and power ICs, with design centers in the US, China, and Taiwan.

The MP4060 product line targets TRIAC-dimmable, high-line LED lighting systems, emphasizing primary-side control, adaptive dimmer compatibility, and thermal reliability for solid-state lighting up to 50W.

FAQ

What is the maximum recommended LED output power for MP4060GS-P?

The MP4060GS-P is characterized and specified for solid-state lighting applications up to 50W, as confirmed in the official MPS datasheet Rev. 1.0 (2015) under Applications. This rating assumes proper thermal management (θ_JA ≤ 96°C/W), appropriate MOSFET sizing, and compliance with safety standards for non-isolated topologies. Exceeding 50W risks violating thermal foldback thresholds (T_START = 145°C) and may compromise dimming linearity or protection response time.

Does MP4060GS-P support 85–265VAC universal input?

No. MP4060GS-P is explicitly optimized for high-line operation between 200–265VAC, as stated in the device description and Typical Application section. Its multiplier gain, VCC charging behavior, and dimming detection thresholds are calibrated for this narrow range. Attempting operation at 85–130VAC results in insufficient MULT signal amplitude, failed ZCD triggering, and unreliable dimmer detection-verified by electrical characteristics tables showing VMULT thresholds referenced to high-line conditions.

How does the BD pin simplify bleeder circuit design?

The BD pin integrates an open-drain MOSFET (R_DS(ON) = 60–115 Ω) that actively pulls down the gate/control node of an external active bleeder transistor during TRIAC off-time. This eliminates the need for discrete logic, resistors, and timing capacitors in traditional bleeder drivers, reducing component count by ≥4 parts and enabling sub-0.5W no-load power consumption-confirmed in typical performance curves showing low standby loss across dimming phases.

Can MP4060GS-P be used in isolated flyback topologies?

Yes, MP4060GS-P supports isolated flyback configurations, as demonstrated in the "Isolated Dual-Channel LED Driver for Warm Sunset Dimming Application" schematic on page 3 of the datasheet. It uses ZCD feedback from the auxiliary winding to achieve primary-side regulation, eliminating the need for optocouplers or TL431 references. Critical design considerations include proper turns ratio selection for V_REF-based current calculation and ZCD divider resistor sizing to meet V_{ZCD_T} = 0.27–0.33 V threshold.

What protection features include auto-restart behavior?

All fault protections-output over-voltage (OVP), output short-circuit (SCP), winding short-circuit, over-temperature (OTP), and over-current (OCP)-feature auto-restart. When triggered, the IC disables switching and allows VCC to discharge; once VCC falls below VCCEN (6.7–7.6 V), the internal charging circuit re-enables and initiates a new start-up sequence. This behavior is guaranteed per Absolute Maximum Ratings and Electrical Characteristics tables, ensuring recovery without manual reset in transient fault conditions.

Is the DIM pin compatible with standard PWM dimming signals?

No. The DIM pin is a dedicated gate driver output-not an input-and generates a proprietary PWM signal (2–4 mA source/sink, V_{DIM_HIGH} = 5.0–6.1 V, V_{DIM_LOW} = 0.3 V) synchronized to the dimming phase for warm sunset applications. It cannot accept external PWM commands. For external PWM dimming, designers must use the COMP pin with a current-source interface or implement a separate DAC-controlled bias network, as no input functionality is assigned to DIM in the Pin Functions table.

What is the purpose of the DAMP pin, and how is it used?

The DAMP pin controls an external damping MOSFET to suppress voltage ringing at the drain node during MOSFET turn-off, directly improving conducted EMI performance. As specified in the Pin Functions table, DAMP provides gate-drive capability with pull-up (70–110 µA) and pull-down (290–450 µA) currents, and clamps at 13–16.5 V. Its use is mandatory in high-frequency, high-power designs to meet EN55015 Class B limits-validated in Typical Performance Characteristics showing radiated/conducted EMI plots with DAMP enabled.